similar to: averaging 3D datasets

well, sure diff() does it thanks alot Thomas > -----Message d'origine----- > De: Liaw, Andy [mailto:andy_liaw at merck.com] > Date: mardi 27 juillet 2004 16:50 > ??: 'Dewez Thomas'; 'r-help at stat.math.ethz.ch' > Objet: RE: [R] computing differences between consecutive > vectorelements > > > Not exactly sure what you want, but seems like you can

Dear R-users, I am a newbie to R so please excuse this naive question for which I couldn't seem to find online answers. I have this data frame containing a series of locations through time (x,y,z,t). I would like to compute the difference in x, y and z between t-1 and t. Sounds easy enough, but how on earth does one loop through vector elements and compute this difference? Thanks Thomas

Dear R-users, When I call Rterm from cygwin, I have no options but typing the exact syntax the first time. If I happen to hit the "delete" key (backspace), R dies when I press enter saying : Error: ... (error concerning the function on the last line of text) Execution halted Perhaps some of you have experienced this and found work arounds? One has to be pretty good to type without

Dear R users, I am sorry to ask you such a pathetic newbie question, but how does one append data at the end of a data frame? I am working with GRASS/R library, but the question is about R. I have a data.frame containing the following variables basinID, distoutlet, drainage_area, slope These variables are stored for all pixels of Grass Raster objects. For each drainage basin (basinID), I'd

My objective is to look at differences in two species of fish from morphometric measurements. My morphometric measurements are head length, eye diameter, snout length, and measurements from tail to each fin. I want to use discrimanant function analyis to determine if there are differences between the two species. I am familiar with R but new to discrimannt function analysis. I want to learn

Dear R-users, There are tons of methods out there for fitting independant variables to a dependent variable. All stats books tell you about the assumptions behind OLS (ordinary least squares) and warn against abusive use of the method (which many of us do disregard by lack of a better knowledge). Most introductory text books stop there and don't tell you what the next best option might be. I

I have a somewhat related question. A while back I was doing some simulations using for() loops, and I wanted to keep track of the iterations using a line of code quite similar to what Dimitris presented below. Instead of printing the iteration message at the end of each iteration (actually, at the end of every 100th), nothing was printed until the for() loop was complete, and *then* all

Hi, my name is Gastón. I just read a question, made by Walter Durka, about a nonparametric discriminant analysis. It wasn´t any answer, and I was wondering if at this moment there is one. I have the same problem as W. Durka. I´m trying to classify and to cross-validate samples of three tunicates species based on morphometric data and to identify the variables that best discriminate between

bonjour, je rencontre quelques soucis au niveau de l'utilisation des fonctions arima.forecast/predict; en effet elles sont dites inconnues alors que j'ai bien install?? et charg?? le package "ts". Aussi, j'aimerai savoir comment visualiser le graphique des pr??visions avec arima et celui des donn??es brutes dans la m??me fen??tre. Tout en vous souhaitant bonne r??ception

Dear list, I am facing a problem in my statistical analyses on R. My experiments are about plants, I record there growth after each cutting (every 3 weeks). 'BC' is for the plant, and '1' to '5' is the time of cutting and recording. The data and R script are : "" BourdCoup <- c(21, 7.2, 9.2, 0, 8.52, 14.7, 8.31, 6.2, 127.05, 115.2, 100.7, 24, 162.64, 136.8,

Dear R-users, I am puzzled by for loops and am kind of ashamed to ask because it is so simple. There must be something I am missing in the way they are executed. Basically, I would like to iterate a given number of time and generate a bunch of stats (that's what loops are designed for, right?). Before doing this I simply want to test simple procedure and see if they work (ie got the syntax

Hi, I'm very new to R. I want to know if there is any way to write only the lower half of a distance matrix created in R to a csv file for example. I get the 'cannot coerce class "dist" into a data.frame' message when I try. I have used as.matrix and can write to a file this way, but as a full matrix. The reason I only want the lower half is that I've been doing some

hello, i'm quite a newbie to the mail server instalation and admin (you must start one day !) i would like to use a rapberry pi to build a system to get the mails from different mail accounts via pop, to store them in the raspberry memory an be able to get them with my thunderbird client on the different computers on my local network. no need to accesse them via internet it is for

I am a relative novice with R and am having some difficulty using 'clusplot' (package Cluster). I have performed PCA analysis (using vegan) on a large set of morphometric measurements and revealed up to 4 principal components. To examine the grouping of the data I have used PAM followed by clusplot to visualise the clusters. My problem is that I would like to see the clusters plotted on

????????????????????????????????? Chers correspondants, Bonjour ! Merci pour votre correspondance que vous envoyez ? mon compte depuis une tr?s longue p?riode. N?anmoins je dois vous dire que je comprends la langue anglaise que tr?s partiellement, aussi je ne retiens de vos ?crits que tr?s peu de choses. Par cons?quent, je vous demanderais de voir la possibilit? de me transmettre vos num?ros en

Hi everyone, I was working on the Paice-Husk Stemmer, which is a Bite Size Project for Xapian, and I have created a C++ as well as Snowball version of it. I read the algorithm, and picked the rules from here: http://www.comp.lancs.ac.uk/computing/research/stemming/paice/descript.htm The C++ code takes rules as input from a file and generates the stem of given word, whereas the Snowball version

Bonjour, Je fais suite au message que vous avez post? en 2015 : http://lists.alioth.debian.org/pipermail/nut-upsuser/2015-February/009568.html J'ai le m?me probl?me et ne trouve pas la solution. Comment vous en ?tes-vous sorti ? D'avance, merci pour votre aide. -- Cordialement Herv? BASTET Nouveau num?ro non surtax? 01 69 42 87 94 Ce message est prot?g? par les r?gles relatives au

unsubscribe -- -- JF Pion /*Marisol Touraine, Ministre de la Sant? ? propos du virus Zika:*/ *"Quand on a un projet de grossesse, il faut avoir des relations sexuelles prot?g?es parce que le virus peut se transmettre par la voie sexuelle. "* Oui, mais?enfin, s?rieusement quoi ? ?? elle r?fl?chit parfois ?? --- L'absence de virus dans ce courrier ?lectronique a ?t?

Je suis absent entre Lun 02/02/2009 et Ven 02/06/2009. Remarque?: ceci est une r?ponse automatique ? votre message "samba Digest, Vol 74, Issue 3" envoy? le 03.02.2009 13:02:42. C'est la seule notification que vous recevrez pendant l'absence de cette personne.

i setup a RedHat server with samba/kerberos/winbind. I can retrieve my user and groups with wbinfo -u and wbinfo -g. BUT in the listings, the name appears like that : wbinfo -u DOMAIN+username1 DOMAIN+username2 DOMAIN+username3 DOMAIN+username4 If i try to authenticate a user with wbinfo -a username1%password i've got this error : plaintext password authentication failed error code was